Fairy tales for adults (long)

Richard Lightman richard at nezumi.plus.com
Fri Feb 14 06:01:53 PST 2003


* Ian Molton <spyro at f2s.com> [2003-02-13 18:08]:
> On Thu, 13 Feb 2003 16:27:34 +0000 (UTC)
> richard at nezumi.plus.com (Richard Lightman) wrote:
> 
> > Atomic clocks are not based on radioactive decay.
> 
> Since when?!
> 
I have not seen a design for an accurate clock based on atomic decay.
The usual designs for atic clocks involve measureing the frequency of
light emitted or absorbed when electrons change energy level in atoms
or molecules.

http://www.boulder.nist.gov/timefreq/cesium/fountain.htm


Richard
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